There used to be a package that caused some serious problems with
upgrades. It was really tricky but I can't recall the name of it since
it was ages ago.
expat? I recall that causing some hair loss.
It's possible but it doesn't ring a bell. I recall that the devs
did a guide for the upgrade. We didn't have the news thingy at the
time so people sort of ran into it like a train hitting a concrete
wall. It could get ugly real fast.